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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '682ab71bf48b1e8d547c11ab22cfb0e7a1bf086471726696a40c30e6a71c2451' 
  AND token = 'i03UplVVF8vHv7Dx20/+qCc7oFNLw6dbgtgOCIRUVWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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