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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '372282e7cf5ec47aa37a5ad9368d4c47b62098afea719b87783f219ca9465284' 
  AND token = 'Fb8K+aAFqtNRysVP98zRk0NkuRhWBgllHEAlNkWzotE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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