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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a188a1ea1f689583384220391f96236173a7df9d96aa4a090bbd9e6d8ff82925' 
  AND token = 'aNx0ATazF+RFJqOV3TB3sO8D29Gq0vC/s0DVrrenBWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}