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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e06141b7409e433253981d7ff6e290ea7d9018eba27f55dcfdec72cfbaefd0e' 
  AND token = 'E4U94Cm90we9XbQooFyHCY7KbK00iLyM6njlAuGtigo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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