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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70e6c88d9dcc84f448a10e4330a8024abc6664f1ecfaefa3c43b9d23ad997ab1' 
  AND token = 'xNInaLtnc7u5oj7cNEDlSFbxXVHGbcpk4rz2yGK7KLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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