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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05e8ce9509265e6f4526ed9aaedae11098aad140c62347d82775faa595865bdd' 
  AND token = 'R3SJ3pneAnaWcSKYW3pq9AZW45uuhOT2Gfu1Qta9sxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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