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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb0c85fda327029f0650db0d8136a89088ec6fdd4bd156630673418dd35dc67e' 
  AND token = 'FaHiDmiUCSinkwtmIyVQBedxkmr4aSb5ULyx86do1LY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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