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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e18580da03f9b884d376a1104400e0def413b77903607b0da45dccc96dfb02d' 
  AND token = 'Wp3yWFMD3mT1hWHNF5B4jMixEoYLqLAYqVl0mV16gOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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