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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5692aaf7f7f2a1d1f94d0b45addc32f40775fd5acb2390666f73ce6e2b684ad6' 
  AND token = 'BjCsiXVoVs6eybcdWw9oltdogpLx4bWQ48zII6L2wyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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