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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e01f5e96756f96d9010f867557576bbcf58054f3cfa7cb0c9d0bacfb4d4b0a5' 
  AND token = 'b3IZPUsZBOex2F25WIVb/RvZNzvTnykUh0pPVSRY1EQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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