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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62f77f8f093e082c1c9fad1f327b1aa81792fab150ae02f2ca77229d768bc029' 
  AND token = 'RXDvDofu5Z7Av+4dn27iY8J0ijtnlccL9YMsGcbrGVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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