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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '383d45c8385a638c57c8f6baf60553a3dac1af23e3ee380dbcc389d7074621e5' 
  AND token = 'uZcw/YRK9U92IMcZyG4W2ZxuSXY06WNl+VAnF0t6iWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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