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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '54b53c137daf2f9553409a215428b84c160ed43f7745e23c3cdbd228888de60c' 
  AND token = 'Yhqxich47b7u+1mR8l9Hl8E0LG7IlSalyPy2hKA86Io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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