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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4ce343efdc077c8279c932199dd33a124f6ea593b4c7adf0b6f8760e01e8ff3' 
  AND token = 'LqElfEttR2mHSVpYlY8w9mrSPxedT42J9NTAQX2tToA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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