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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60425ff6114bc04e744d277086f0fb699abdaa5a5f5f772a8b1803934fbc6d79' 
  AND token = 'XFvywnkZePpBNGzmFTEoEbFdTXpAOvXj2rnAG3wOu90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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