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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecb1aa98c06b9cbe7338e2d2e86e38d38930138662fe65ec59edfdc7e394b544' 
  AND token = 'NojYgyS30jRzjVrfLHYEn1O2PafxM09xHDrOS/tf2SE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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