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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0eddf1852d9d1469ebc73c7e29df96210c8d3c5497e8a63c4b52f270134ffa95' 
  AND token = '45G2w6AECdSOdynK3Ch/pOOszff7/E1oYx6QhYGfBaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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