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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f111d86edf54de1a652ca84d0f3dbb67df262b227f3c54bb6c6c37443e74211e' 
  AND token = 's0NsT7BNgnbL79EAyjQsF/udb64nWDXpkF3Y2AclVI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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