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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c3d9dd59301e555d1f49e660eaced251c67b96fecee9399e789e792f655bd01' 
  AND token = 'FxpLF/U4JevbDgIjNsZT8nIwVQ1NmPzRwOK2iVtU6mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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