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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd72e91d1ea3d2a98239bfe44c73c061c265abfd31ec1d5370d6df4896e35a14e' 
  AND token = 'wno7mhQ0/l0/V9SKexrYQ92TViIv+2pEIe11IYZHEXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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