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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34e7785afb5121943428281ffb0d486e93199d0faa0285f0be7ef3735fe432af' 
  AND token = 'Gj531M7mU7jRhdYEntrPAW+m4/bYENeMU0k7qTDSYik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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