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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '055df0dc1111071c90f95b819ef2b3d989c382f01bf9d38d5220c4be2a80eb25' 
  AND token = 'H6y6hOSH0yGqEOPqpHrGL4I0/88CtH4mtD3PS+XBGv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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