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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0997681b5d48809ff912d2bbac75565f8ac921cd9101064fa7e0055d1912b23' 
  AND token = 'vqBY64x8EV0/7gQR8u3VUaL6Rfpi1yY1KnUkZLN65DI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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