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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01c7162f72db3c5758bb7a44a7d4f6e47a6263cfa782340cefcb6413436643ed' 
  AND token = 'eDdt2LZNSc63mULBD6MIClew8wJWsaUmpoijzZmniTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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