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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e083e2a66d36026b6343307a7acbcbdd40b1561545c78f874e550a1f6ec99bcd' 
  AND token = 'DPZYLYx7FeRv5QJBPK9efUIR2SIk6pBice1Pzd0n4bQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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