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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7efa74bbad5f762c5c9a0f96be4bfea993d2f5089c6badaf0361ee7b0c2b2faf' 
  AND token = '+3pKat0IxydrQFafc3J1H+7xYE7yZeVdxTmxcCasMeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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