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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9da9f9cc63fb1059fac367fbc714f76312c5a95cca69126ab3c77c98c6ad8029' 
  AND token = 'THNeeuwKLpQ52Yl/q6KyMbvwiTskVaH7pg2pTn5ILRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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