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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e2b5e3c954113bdd363be798899feada6d0bb5bad1c62bd535c85c080179814' 
  AND token = 'eLukTrBG4EUUU4aWk8ELErBzVAwu6wbXJ2xpTdOI+VI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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