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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c05a051c0f9d1c50e73dacf2ada59dc0ec772db0fa11da21d3806f7122009101' 
  AND token = 'NXJEAhfKyS2GLB4PLwRHsHXjPpnha5o3MdV3u91fvek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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