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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e0afcc379555b85f3776b37f749c7f2da61cf8585160b66b427f5ebf6d357a0' 
  AND token = 'asBgtGvcT3LNslfXi5z4xCSR8Xv34vbA3MFI9t4j9qo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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