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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c15e0c1fae4666b2b5beeca013d327394875455ff468e71e0fdcb170410cc29a' 
  AND token = '5Q8N+296h7Ka+l5f/8+8GzF5Pbe7UpwEP73lK2Uuo2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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