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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '891106653a6a64f8aa994567ccdd4162efdf892de07b5045189fdf39a3d1db05' 
  AND token = 'Pm2EJOoMjbiuZm09OEPZDqo53hyB/PK69OKiTWteSQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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