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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee017dabd6bf943c8ed4f6a9e6fd7c876f8551e9086f867b1f2ef90ef2329faa' 
  AND token = '7G2SG6V+dToR3UT5FpgzV5ii44PrL//otWc8UlUZ4/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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