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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8936c893f99c05d1654aaf29fcfe105b56e7d4ce74aab4f2188bdab9dd752a07' 
  AND token = '+kiCaSqyt88AOHgw7Mba0wizZTiQgRXgdKyQltgS0GU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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