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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c707ddb6b8aeafb750555d3f9664bd1bcb1bafcaecca1468f4cf58ffed1c89a1' 
  AND token = 'R1AmbUBNv8Bm2HMijxiC0Y/Q2XRaJDCmvINJocHBEzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}