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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f159b7fa07041df05055069feb2cf80f9f7cefa12398c8ac28710a1760b0d9a' 
  AND token = '/E8WqT6f8AlTsf0WyPA6A8cKaw8PBymvhG2zqNj96sM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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