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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '095e851e58969d190b769f2c9f15482d99c06518db821b088310e37ef358d175' 
  AND token = 'zPhI83mIIt0B91IENnNSb2POs1+kWCCB3e1fOToRAjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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